Dust allergens are substances found in dust. They may include:
Fabric fibers
Lint
Feathers
Stuffing materials
Animal protein (dander, saliva, urine, and body oils)
Bacteria
Mold and fungus spores
Food particles
Plants
Insects and their waste
Dust mites are microscopic organisms that normally live throughout homes and businesses. The mites and their waste products thrive in:
Draperies
Stuffed animals
Bedding, pillows, and mattresses
Upholstered furniture
Carpets
Air (but only right after vacuuming or sweeping)